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15
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What is plasma mostly made of?
Water.
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15
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Name the three main types of blood vessels.
Arteries, veins, and capillaries.
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15
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Why are valves in veins important?
They stop blood from flowing backwards.
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15
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What is a pulse?
The pressure wave in arteries when the heart pumps blood.
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15
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What part of the blood helps fight infection?
White blood cells.
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monster
Reset all scores!
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fairy
Take points!
5
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25
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gift
Win 25 points!
Okay!
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banana
Go to last place!
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15
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What happens to carbon dioxide in the blood when it reaches the lungs?
It diffuses into the air sacs and is breathed out.
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15
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Which blood vessel carries blood back to the heart?
Veins.
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thief
Give points!
5
10
15
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25
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rocket
Go to first place!
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rocket
Go to first place!
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baam
Lose 25 points!
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lifesaver
Give 10 points!
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gold
Win 50 points!
Okay!
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gift
Win 10 points!
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banana
Go to last place!
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15
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Which side of the heart pumps blood to the rest of the body?
The left side.
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15
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What part of the blood helps to stop bleeding by clotting?
Platelets.
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15
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What is heartbeat?
The contraction and relaxation of the heart muscle.
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15
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What organ pumps blood around the body?
The heart.
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15
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What does the heart do when it contracts?
It pumps blood out.
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15
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Which side of the heart pumps blood to the lungs?
The right side.
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